Core-shell Au/Ag nanoparticles embedded in silicate sol-gel network for sensor application towards hydrogen peroxide

Journal of Chemical Sciences

Ramasamy Ramaraj1¹  Shanmugam Manivannan¹ 

[1] Centre for Photoelectrochemistry, School of chemistry, Madurai Kamaraj University, Madurai 625 021$$

关键词: Core-shell Au/Ag nanoparticles;    modified electrode;    electrocatalysis;    hydrogen peroxide;    sensor.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

The electrocatalytic activity of core-shell Au100-𝑥Ag𝑥 (𝑥 = 15, 27, 46, and 60) bimetallic nanoparticles embedded in methyl functionalized silicate MTMOS network towards the reduction of hydrogen peroxide was investigated by using cyclic voltammetry and chronoamperometric techniques. Core-shell Au/Ag bimetallic nanoparticles were characterized by absorption spectra and HRTEM. The MTMOS silicate sol-gel embedded Au73Ag27 core-shell nanoparticles modified electrode showed better synergistic electrocatalytic effect towards the reduction of hydrogen peroxide when compared to monometal MTMOS-Aunps and MTMOS-Agnps modified electrodes. These modified electrodes were studied without immobilizing any enzyme in the MTMOS sol-gel matrix. The present study highlights the influence of molar composition of Ag nanoparticles in the Au/Ag bimetallic composition towards the electrocatalytic reduction and sensing of hydrogen peroxide in comparison to monometal Au and Ag nanoparticles.

【 授权许可】

Unknown